Spin-crossover in Fe(III)-Komplexen von Thiosemicarbazonen der 2-Oxo-Carbonsäuren
作者:
C. Michalk,
T. Klink,
K. Knese,
A. Seidel,
Ph. Thomas,
期刊:
Isotopenpraxis Isotopes in Environmental and Health Studies
(Taylor Available online 1991)
卷期:
Volume 27,
issue 2
页码: 76-81
ISSN:0021-1915
年代: 1991
DOI:10.1080/10256019108622473
出版商: Taylor & Francis Group
关键词: complexes;complexes isomerization;iron complexes;moessbauer effect;spin;spin-spin relaxation
数据来源: Taylor
摘要:
The Fe compounds (Et4N)2{[((TSP) (TSPH)Fe]2suc}3) and K[Fe(TSP) (TSPH)prop] · 3H2O3) were characterized by means of57Fe Moessbauer spectroscopy and magnetic measurements. In the temperature region from 300 to 390 K the Fe(III) of both compounds undergoes a discontinuous transition from low spin state to high spin state, returning only slowly into low spin state after cooling to room temperature. This process causes a hysteresis behaviour of the magnetic values. The spin crossover is connected with a complex isomerization. Moessbauer spectra of the compounds show a significant asymmetry, which can be explained by relaxation effects according to Blume's theory.
点击下载:
PDF (394KB)
返 回